Why is it confusing to refer to organisms by common names ?

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?

Vessels draining the myocardium of the heart, open primarily ,into which chamber?